Ratchet-action, swivel type, fast release design. Quick & easy laydown. Mounts on 1'' and 1-1/2'' vertical, horizontal or slanted rails. 9/32'' hole for cable feed-through. Standard 1''-14 thread. Handles antennas up to 8'. Heavy-duty construction.

MFG# 4188 SL 4188SL UPC# 719441110703